摘要
本文从BitCloud协议栈的应用特点、ATmega128RF单片机的射频特性、ZigBee网络结构、滤波算法、位置估算方法和网络承载能力等方面,详细描述了室内定位系统的设计与实现的主要内容和关键技术,并实验证明了实际效果.在位置估算方法方面提出了平滑滤波和极大似然估计法结合的有效的位置估算方式,成功解决在使用RSSI定位算法时,难以得到稳定信号强度值和估算误差大等问题.试验结果表明,该系统中的采样稳定性优于普通RSSI算法,定位精度较高.
Base on the application characteristics of BitCloud protocol stack, ATmega128RF microcontroller RF characteristics, ZigBee network structure, filtering algorithms, and position estimation methods, described in detail the main content of indoor positioning systems and the implementation of key technologies. In the position estimation methods proposed smoothing filter, combined with maximum likelihood estimation method to an effective way to estimate the position. Experimental results show that the algorithm is more stable than ordinary RSSI algorithms, and high positioning accuracy.
出处
《计算机系统应用》
2014年第6期74-78,共5页
Computer Systems & Applications
